Drawer slide

ABSTRACT

The invention concerns a drawer slide that has a swiveling double-armed lever around a pivot bearing and whose lever arms extend out from the pivot bearing and whose first lever arm, depending on the closed position, forms a positive/form-fitting connection between a linearly moving part and a cabinet-fixed part of the drawer slide, and whose second lever arm is connected to the draw-pull tension spring&#39;s first end and the second end of the draw-pull tension spring, distanced from it by under spring extension to a linearly moved or cabinet-fixed part of the drawer slide, is fastened. When the drawer is pushed in, the form-closure of the lever&#39;s first arm is turned out of a rest position over a dead center position in an automatic position, such that a further turn of the lever automatically shortens the pre-stressed spring on the second lever arm, so thus, pulling the drawer slide with the drawer into the cabinet opening. The advantage of the drawer slide with the invention-related self-closing mechanism is that after the ‘over-snapping’ of the lever&#39;s dead center position, which affects the spring action of the draw-pull tension spring on the turning lever in such a way that the torque increases on the lever with increasing pulling distance of the drawer. Thereby, the result is that the pulling force, which is directly proportional to the torque on the lever that affects the drawer, is small at the beginning of the self-closing cycle, but becomes greater with the increasing pulled distance so the retaining strength is the greatest when the drawer is closed completely.

[0001] The invention concerns a drawer slide that has a self-closing mechanism according to the characterizing introductory clause of the independent claims.

[0002] Drawer slides with self-closing mechanisms of these types are designed for the purpose of pulling a drawer automatically into a cabinet opening by means of a drawer slide. When the user pushes the drawer into the cabinet opening, the self-closing mechanism works in such a manner that the drawer closes automatically without further pushing from the user within the last section of the drawer's insertion/closing and is then held there. If the drawer is opened again, the user must then overcome the retaining strength of the self-closing mechanism and work against the draw-pull force of the self-closing mechanism in order to bring the drawer to the point at which the self-closing mechanism is no longer effective.

[0003] The usual way in the state of technology to produce the draw-pull force of these types of self-closing mechanisms is to insert flexible springs, which are particularly designed as screw tension springs. Here, as examples, self-closing mechanisms are indicated in AT-393 948 B and AT-4002 19 B.

[0004] The disadvantage of these state of technology drawers is that the flexible spring elements that produce the self-closing force for pulling in and holding the drawer inside the drawer opening of the cabinet body have an unfavorable force-way-process over the self-closing section.

[0005] When the existing self-closing mechanisms are operated, there is a constant reduction of the draw-pull force of the self-closing spring elements over the closing path, which is not desired. The draw-pull force is at a maximum at the beginning of the drawing-in process by means of the automatic mechanism and then decreases consistently along the self-closing path so that the closing retaining force is relatively small at the closing of the drawer. At the beginning of the closing cycle, this initially strong self-closing draw-pull force leads to an inadvertently strong acceleration of the drawer, so that the user gets the feeling that the drawer is being pulled out of his hand. So that this effect does not become extreme, the initial force of the spring cannot be increased as desired, in order to achieve a maximum closing strength.

[0006] The task of the presented invention is to design a drawer slide with a self-closing mechanism, whose draw-pull tension spring has a more favorable force relationship that the previous state of technology. The initial self-closing force of the draw-pull tension spring, which operates the drawer that is to be closed, should not be greater than the closing holding force of the drawer at the end of the closing process. A smaller initial closing force should be the aim, starting from a defined closed position during the drawer's closing and a greater closing holding force in the closed drawer's end position (the drawer is inserted completely into the cabinet opening).

[0007] The technical precepts of the independent claims serve to solve the task presented.

[0008] A fundamental feature here is the fact that the drawer's self-closing mechanism on the drawer slide around the pivot bearing has a swiveling double-armed lever, whose first lever arm, by means of a turning motion together with the closing position, forms a positive/form-fitting and/or friction fitting connection between a linearly moving part and a cabinet-fixed part of the drawer slide and on whose second lever arm a first end of the draw-pull tension spring is fastened and whose second end of the draw-pull tension spring is distanced by spring pre-stress to a linearly moving or cabinet-fixed part of the drawer slide; whereby, when the drawer is pushed in, the form closure/positive locking of the first lever arm causes the lever to turn out of the engagement position over a dead center position in an automatic position, in which further turning of the lever automatically shortens the pre-stressed spring at the second lever arm and, thus, pulls the drawer slide, together with the drawer, into the cabinet opening.

[0009] The advantage of the drawer slide with the invention-related self-closing mechanism is that after the lever's dead center position has been tripped, the spring action of the draw-pull tension spring affects the turning lever in such a manner that the torque increases on the lever with the increasing pull-in (self-closing) distance of the drawer. The result is that the self-closing pulling force on the drawer is directly proportional to the torque on the lever; at the beginning of the self-closing, the pull is small, but becomes greater with the increasing self-closing pull distance and the retaining hold is strongest when the drawer is completely pulled in or closed.

[0010] In a preferred embodiment of the invention the double-armed lever is attached swiveling to a moving part of the drawer slide, in particular, to the drawer's decor or to the drawer rail itself. The first lever arm of the double-armed lever is then, from a certain closing position of the drawer, is engaged positive/form-fitting by a stationary stop on the cabinet rail or on the cabinet angle. When the drawer is pushed further into the cabinet body, the double-armed lever turns over a dead center position and the self-closing mechanism starts automatically by the further rotation of the double-armed lever around the pivot bearing. This is managed by the automatic shortening of the pre-stressed draw-pull tension spring that is fastened with its first end to the second lever arm and its second end on the drawer's decor or on the drawer rail itself, and, like the double-armed lever also.

[0011] Naturally, in this preferred embodiment of the invention, the double-armed lever can also be located swiveling on another movable part of the drawer slide, as for example, the center rail (with full extension) or on the synchronous racks of the linear moved carriage (if available) or on any other desired linearly moved part of the drawer slide.

[0012] It is important with this only that the double-armed lever is attached swiveling to a linear moved part of the drawer slide and engages positive/form-fitting with a stationary and/or cabinet-fixed stop, depending on the draw-pull closing distance. The result is that the draw-pull tension spring is brought over a dead center and subsequently pulls the drawer with increasing torque into the cabinet. When the drawer is completely pulled in, the greatest holding moment exists for the drawer, because the distance between the fulcrum of the lever and the engagement point of the draw-pull tension spring to the second corresponding lever arm is the largest possible. The largest draw-pull torque would be in the position when the pivot bearing and the engagement point of the lever's draw-pull tension spring lie vertical above one another, thus, maximizing their distance.

[0013] In a second embodiment of the invention, the kinematic reversal of the first embodiment of the invention is to be stressed. The double-armed lever is, thereby, attached swiveling at any stationary and/or cabinet-fixed part of the drawer slide, in particular on the cabinet rail or on the cabinet angle. The first arm of the double-armed lever is then brought to a positive/form-fitting engagement, starting from a certain closing position by a linear moved stop on the drawer's décor or on the drawer rail itself. The draw-pull tension spring is again connected with its first end to the second lever arm and with its second end, however, on any stationary and/or cabinet-fixed part of the drawer slide, especially on the cabinet rail or on the cabinet angle, as already the double-armed lever itself.

[0014] It is important with this that only the double-armed lever is attached swiveling on a stationary and/or cabinet-fixed part of the drawer slide and engages positive/form-fitting with a linear moved stop, depending upon the draw-pull distance. With it the draw-pull tension spring is brought over a dead center and subsequently pulls the drawer with increasing torque into the cabinet. The greatest holding moment takes place when the drawer is completely pulled in/closed, because the distance between the lever's fulcrum and the draw-pull tension spring's engagement point on the second corresponding lever arm is the largest possible. The draw-pull torque would be greatest in the position when the pivot bearing and the engagement point of the lever's draw-pull tension spring lies vertically over one another, thus maximizing their distance.

[0015] In both embodiments it is, however, important that between the double-armed lever's fulcrum and the suspension point of the spring's second end on a linear moved or on a stationary drawer part, no substantial relative movement takes place.

[0016] Preferably it is intended that the lever and the suspension point of the spring's second end are connected to the same component. This is not, however, compellingly necessary so that in the first embodiment, for example, also the lever on the décor and the spring's second end on the drawer rail can be connected or vice versa. And in the second embodiment, for example, the lever on the cabinet rail and the spring's second end on the cabinet angle can be connected or vice versa. It is only important that no relative movement between the double-armed lever's fulcrum and the spring's connection point on one of the drawer parts results, because otherwise the spring would constantly proceed in its shortest condition.

[0017] The fastening point of the spring on one of the drawer parts lies here preferably in a common horizontal and/or vertical level with the fulcrum of the double-armed lever, which, however, is not necessary for the solution since positions other than these levels are also possible.

[0018] It is preferred that the lever's pivot bearings and the spring's fastening point on the second lever arm are provided in the draw-pull direction before the fastening point of the spring is located on the linear moved and/or stationary part of the drawer slide. Also, it is preferred that the spring's fastening point on the second lever arm in the draw-pull direction is provided during the rotation that occurs before the pivot bearing or maximally directly vertically over it. Naturally also, all other relative layouts/systems/arrangements of the pivot bearing and the engagement points of the spring are possible. Important is only that the spring after the dead center position, if the automatic mechanism works, is always pre-stressed and that no substantial relative movement results between the pivot bearing and the suspension point of the spring on the linear moved and/or stationary part of the drawer slide, so that the lever can also be turned and the pivot bearing does not only shift or move linearly. Also, it is meaningful, if the spring before the dead center position, if the automatic mechanism does not work, is pre-stressed so that the lever waits in a stable park position (rest position) until it can engage into the stop (automatic position).

[0019] The double-armed lever is preferably designed in such a way that both lever arms have different lengths. The relationship of the two lever arm lengths lies, depending on the drawer, preferably between 2 and 3; whereby, the longer first lever arm causes the form closure and the shorter second lever arm forms the fastening point for the end of the spring and thus causes the torque of the lever and/or the draw-pull action of the drawer.

[0020] The angle between the lever arms lies around approximately 120°; whereby, angles slightly under or over 120° are also applicable, as for example, 100°, 110°, 130° or 140°.

[0021] The over dead center position (rest position), in which the self-closing mechanism does not work, is approximately minus 10° for the short second lever arm, which angle must then be overcome against the traction power of the spring until the self-closing mechanism begins to work at or over the dead center. Also, other angles can be used between minus 1° and minus 30°, which should reliably prevent an unintentional releasing of the self-closing mechanism and/or an unintentional turning of the lever. The long first lever then has approximately minus 135°.

[0022] In the end position (that is, the drawer is completely pulled in by means of the self-closing mechanism), the short second lever with the spring engagement point has about plus 45° and the long first lever has about minus 80°.

[0023] In the pulled-in position/end position of the drawer, the length of the spring corresponds somewhat to the length of the first lever arm; whereby, favorable lever ratios and spring dimensions are made possible.

[0024] For the lever's end positions, respective rotation stops are provided. The rotation or pivot stop for the lever's position in the drawer's fully closed position can, by the stop, be included for the release of the self-closing mechanism.

[0025] This stop for releasing the self-closing mechanism, additionally has a recess that can engage into the long second lever arm and tilts there in the drawer's closed position so that the drawer cannot be pushed further. This recess is limited by a low and a high wall; whereby, the low wall lies in the push-in direction and, when the drawer is pushed in, is crossed over by the long lever. When the drawer is pushed further in, then the long lever impacts on an intake bevel of the high wall, so that the lever begins to turn in motion.

[0026] For both of the above-mentioned embodiments of the invention, the following applies for the operation of the automatic self-closing mechanism: In the disengaged non-operational position of the self-closing mechanism (i.e. if the drawer is pulled out sufficiently enough out of the cabinet's opening), the double-armed lever is in a position which lies easily over the dead center of the spring's maximum deflection.

[0027] Now if the drawer is pushed into the cabinet opening, the double-armed lever runs on the stop and the double-armed lever begins to turn around its pivot bearing.

[0028] In this way, the double-armed lever is turned in the direction of its upper dead center, where the spring has its maximum length and also operates the maximum spring tension. The drawer must be pushed against the spring tension over the dead center until the self-closing mechanism begins to work.

[0029] Exactly in the dead center of the lever, then, neither a push-in resisting force nor a draw-pull force works, so that the drawer lies push- and pull-free in the cabinet opening. This is only valid when the pivot bearing and the engagement point of the spring on a drawer slide part lies in a common horizontal level.

[0030] Now if the user of the drawer pushes it further into the cabinet opening, then the double-armed lever turns out over the dead center position and the self-closing mechanism begins to work. Those working on the lever and only in small limits the decreasing spring force action, while the spring is pulling together causes the lever's torque, depending upon the lever distance to the pivot bearing and also depending upon the distance of the lever's fulcrum to the spring's point of engagement.

[0031] The spring is pulled together from the dead center from its maximally stretched condition with the maximum spring pre-stress force to the lever distance directly zero in a shorter position with optimal/maximum lever distance. In this condition then, the (smaller as in the dead center) spring action affects the optimal/maximum lever distance, so that then the drawer (in its pulled-in closed position) affects the optimal, if necessary, maximum torque on the lever and with it the optimal, if necessary, maximum draw-pull self-closing force on the drawer.

[0032] In a further embodiment of the invention, the double-armed lever of the self-closing mechanism can also have a damping of its movement that effects a damped, harmonious linear closing movement of the drawer into the cabinet's opening. In particular, the damping is placed in the area of the double-armed lever's pivot bearing in the form of a rotation shock absorber; whereby, however, all other absorbing/damping principles according to the presented invention's state of the art should be included.

[0033] Depending on the relationship of the levers (of the double-armed lever), depending on the position of the draw-pull tension spring's engagement point, depending on the mounting/fitting point of the lever and spring and depending on the type of manner of the damping of the lever's movement, the draw-pull/self-closing movement of the drawer can be selected almost at will. However, it is important that the draw-pull force is kept small at the beginning and the closing retaining force is kept relatively large, so that a reversal of the relationships as with the self-closing mechanism is given with the state of technology.

[0034] The self-closing mechanism, according to the presented invention, is preferably located at the front area of the drawer in the area of the panel, which facilitates the initial installation, maintenance, and repairs. So all adjustments for the drawer can be made within only one area.

[0035] In the following the invention is described more closely based on the enclosed drawings and designs, from which further characteristics and advantages are derived.

[0036] Shown:

[0037]FIG. 1: A side view of a rail of the drawer slide, according to the invention, during the drawer's closing, in a position at the moment when the lever begins its engagement with the stop;

[0038]FIG. 2: A side view of a rail of the drawer slide, according to the invention, during the drawer's closing, in a position with the self-closing mechanism operating according to the lever's dead center;

[0039]FIG. 3: A side view of a rail of the drawer slide, according to the invention, when the drawer is in a closed position;

[0040]FIG. 4: A front view of a section of the drawer slide, according to the invention, along the Line IV-IV of FIG. 3;

[0041] FIGS. 1-3 show the side view of the invention-related drawer slide. FIG. 4 shows its cut front view of the closed drawer or the drawer slides that are completely drawn in.

[0042] The Figures show a drawer rail of a full extension for a drawer slide, which, however, is not to be considered limiting for the invention. The self-closing mechanism as described in part before in general, can naturally also be used with partial extension systems, but also with all variants of full-extension systems of drawer slides. In the following, however, in order to simplify, only one type of full extension system is described.

[0043] Shown in the Figures is only one drawer slide for a side of the drawer; whereby, naturally, a total of two drawer slides of this type (one for the left side and one for the right side of the drawer) per drawer are needed.

[0044] The drawer slide, according to FIGS. 1-4, have a cabinet body angle (1), which is located stationary within an opening of the cabinet body (not shown) and faces horizontally a drawer slide of the same type.

[0045] A cabinet rail (2) is connected on the cabinet angle (1) and carries the stop (17) for the turning and form-fitting (positive) locking of the lever (10).

[0046] A center rail (4) is held linearly movable on the cabinet rail (2) by a first carriage (3) and which, again, carries a drawer rail (6) linearly movable by a second carriage (5).

[0047] The décor (7) is fixed on the drawer rail (6), on which the drawer (not shown) is anchored.

[0048] Between the carriage (3) of the cabinet rail (2), the center rail (4) and the drawer rail's (6) carriage (5), there is a synchronization in the form of toothed racks and pinions. The racks (8) are each connected with the carriage (3) of the cabinet rail (2) and with the carriage (5) of the drawer rail (6), that stand in the engagement between the pinion (9) on the center rail (4). In this way, a balanced and even movement is guaranteed between the rails (2,4 and 6).

[0049] The draw-pull lever (10) sits turnable on a pivot bearing (11), which is attached at the decor (7).

[0050] In particular, it is evident in FIG. 4 that the short lever arm (12) of the lever (10) projects upward into a receptacle space in the decor (7) and has a tap or plug on its end that serves as a holding point for the draw-pull tension spring (14), which essentially is likewise in the receptacle space of the decor (7).

[0051] The long lever arm (13) of the lever (10) projects downward within the decor (7) and engages positive and form-fitting there in the stop (17) since the drawer is completely inserted. The lever (10) and/or the lever arm (13) is curved z-shaped, so that it can be guided along the rails (2,4,6) to the stationary stop (17) on the cabinet rail (6).

[0052] FIGS. 1-3 show the spring (14) that is located between the point of engagement (15) on the short lever arm (12) and the point of engagement (16) on the décor (7).

[0053] According to FIGS. 1-3, the spring's (14) point of engagement (16) lies with the pivot point (11) in a somewhat horizontal plane and, according to FIG. 4, also in a somewhat vertical plane so that favorable lever conditions are reached. Important here is that the pivot bearing (11) of the lever (10) is attached on the dćor (7), just like the spring's (14) point of engagement (16).

[0054] When pushing the drawer (not shown) into the closing direction (22), the drawer rail (6) that is connected to the décor (7), guides the double-armed lever (10) that is held swiveling on the decor (7) to the stop (17) and, in such a way, is pressed out of its stop position, according to FIG. 1.

[0055] The draw-pull tension spring (14) transfers its force to the lever (10). Thus, the lever (10) is rotated in the turning direction (23) and swings during the insertion, into the carrier (17) that is located on the cabinet rail (2). The carrier (17) has a front low wall (18) and a rear high wall (19) with a bearing surface (20); whereby, a recess (21) is defined between both walls (18,19) that engaged with the lever's (10) long arm (13) when the drawer is pushed in/closed.

[0056] By turning the lever (10), the distance of the spring's point of engagement (15) on the short lever arm (12) to the pivot bearing's (11) fulcrum is increased. As a result, a constant increase of the draw-pull/self-closing force is achieved when the drawer is pushed in after the dead center. So, thus, the decor (7) is pulled in and the drawer does in with the desired movement, which, if necessary, is damped.

[0057]FIG. 1 shows the drawer inserted in the closing direction (22) into the cabinet body (not shown) and the lever (10) is turned by the fixed stop (17) in the turning direction (23).

[0058]FIG. 2 shows the state of FIG. 1 with the subsequent movement, where the short lever arm (12) swings over the dead center (dead center=shorter lever arm [12] stands level/horizontal at 0°) and, afterwards, the draw-pull tension spring (14) starts the self-closing pulling movement with only a small force because the distance between the spring's point of engagement (15) on the short lever arm (12) to the turning point/fulcrum (11) is still small. This corresponds to a small engagement angle (24) between the logitudinal axis of the draw-pull tension spring (14) and the longitudinal axis of the short lever arm (12).

[0059]FIG. 3 represents the subsequent state of the movement, according to FIG. 2, which is the closed position of the drawer, in that the engagement angle (24) between the logitudinal axis of the draw-pull tension spring (14) of the short lever arm (12) always becomes larger in reference to FIG. 2 and is at the largest in FIG. 3. Accordingly, the closing moment of the draw-pull tension spring (14) is the largest in the closed position.

[0060] So the self-closing movement increases steadily from the dead center from zero up to the maximum achieved during the self-closing pulling position, according to FIG. 3, where the self-closing moment is used as a closed retaining moment. Drawing Legend 1. Cabinet angle 2. Cabinet rail 3. Carriage cabinet rail - center rail 4. Center rail 5. Carriage center rail - drawer rail 6. Drawer rail 7. Décor 8. Toothed rack 9. Pinion 10. Draw-pull lever 11. Pivot bearing draw-pull lever 12. Shorter lever arm 13. Longer lever arm 14. Draw-pull tension spring 15. Draw-pull tension spring's point of engagement on shorter lever arm 16. Draw-pull tension spring's point of engagement on décor 17. Stop for lever 18. Front wall 19. Rear wall 20. Bearing surface 21. Recess 22. Closing direction 23. Turning direction 24. Engagement angle 

1. The drawer slide with self-closing mechanism with flexible springy self-closing pull-in element, has on each of the two drawer sides a slide system that has on at least one connectable cabinet rail (2) on a cabinet body, which is linearly movable by a linear bearing (3,5) on a drawer rail (6) is characterized by a double-armed lever (10) that is provided around a pivot bearing (11) on the drawer slide as a self-closing mechanism for the drawer and whose first lever arm (13), by means of a turning motion together with the closing position, forms a positive form-fitting and/or friction-fitting connection between a linearly moving part and a cabinet-fixed part of the drawer slide, and on whose second lever arm (12) is connected to a first end of the draw-pull tension spring (14) and is distanced to the second end of the draw-pull tension spring (14) by a spring tension that is connected to a linearly moving or cabinet-fixed part of the drawer slide; whereby, when the drawer is pushed in, the form closure/positive locking of the first lever arm (13) causes the lever (10) to turn out of the engagement position over a dead center position in an automatic position, in which a further turn of the lever (10) shortens automatically the pull-draw tension spring (14) on the second lever arm (12) and causes the drawer slide with the drawer to be pulled into the cabinet opening.
 2. Drawer slide, according to claim 1, is characterized by the double-armed lever (10) is attached swiveling on a movable part of the drawer slide and its first lever arm (12), starting from a certain closing position of the drawer, positively/form-fitting and/or friction-fitting engages with a stationary part of the drawer slide.
 3. Drawer slide, according to claim 2, is characterized by the double-armed lever (10) that is attached swiveling on the drawer rail (6) or on one of the drawer rail's (6) fastened décor (7) and its first lever arm (12), starting from a certain closing position of the drawer, engages positively/form-fitting with it by means of a stationary stop (17) on the cabinet rail (2) or by a cabinet angle (1) attached on it.
 4. Drawer slide, according to claim 1, is characterized by the double-armed lever (10) that is attached swiveling on a stationary part of the drawer slide and its first lever arm (12), starting from a certain closing position of the drawer, engages positively/form-fitting and/or friction-fitting with a moveable part of the drawer slide.
 5. Drawer slide, according to claim 2, is characterized by the double-armed lever (10) that is attached swiveling on the cabinet rails (2) or on a cabinet angle (1) attached on it and its first lever arm (12), starting from a certain closing position of the drawer, is attached by a positive/form-fitting engagement by a stationary stop (17) on the drawer rail (6) or on one of the fastened decors (7) on the drawer rail (6).
 6. Drawer slide, according to one of the claims 1 to 5, is characterized by the lever (10) and the suspension point (16) of the spring's (14) second end that are fastened on the same component unit and, so no substantial relative motion results between the pivot bearing (11) of the lever (10) and the suspension point (16) of the spring's (14) second end.
 7. Drawer slide, according to claim 6, is characterized by the fact that both the pivot bearing (11) of the lever (10) and the suspension point (16) of the second end of the spring (14) are located on the décor (7).
 8. Drawer slide, according to one of the claims 1 to 7, is characterized by the spring's (14) fastening point (16) lies in a common horizontal and/or vertical level with the double-armed lever's (10) pivot bearing (11).
 9. Drawer slide, according to one of the claims 1 to 8, is characterized by the lever's (10) pivot bearing (11) and the spring's (14) fastening point (15) on the second lever arm (12) in the push-in direction are provided before the spring's (14) fastening point (16) on the linearly moving and/or stationary part of the drawer slide.
 10. Drawer slide, according to one of the claims 1 to 9, is characterized by the spring's (14) fastening point (15) is provided on the second lever arm (12) in the push-in direction during the rotation that is always before the pivot bearing (11) or directly vertically over it.
 11. Drawer slide, according to one of the claims 1 to 10, is characterized by the fact that both lever arms (12,13) of the lever (10) have different lengths.
 12. Drawer slide, according to claim 11, is characterized by the lever arm (13) for the coupling between the moved and motionless parts and is longer than the second lever arm (12) on which the spring (14) is secured.
 13. Drawer slide, according to one of the claims 11 to 12, is characterized by the relation of the lever arm's (12,13) lengths that lie between 2 and
 3. 14. Drawer slide, according to one of the claims 1 to 13, is characterized by the angle between the lever arms (12,13) that lie between 100° and 140°.
 15. Drawer slide, according to one of the claims 1 to 14, is characterized by the rest position of the second lever arm (12) that is in the range of between minus 1° and minus 30°, depending on the vertical dead center position (0°).
 16. Drawer slide, according to one of the claims 11 to 15, is characterized by the fact that when the drawer (in the closed position/end position) is completely inserted or pulled into the cabinet, the lever arm (12) is in the range of between plus 45° and plus 90°, depending on the vertical dead center position (0°).
 17. Drawer slide, according to one of the claims 1 to 16, is characterized by the fact that when the drawer is in its closed pulled position/end position, the spring's (14) length corresponds somewhat to the length of the first lever arm (13).
 18. Drawer slide, according to one of the claims 1 to 17, is characterized by the drawer's damping movement that takes place while the self-closing mechanism in the lever's (10) automatic position is operating.
 19. Drawer slide, according to claim 18, is characterized by the drawer's damping movement that takes place by means of the lever's (10) damping movement.
 20. Drawer slide, according to claim 19, is characterized by the lever's (10) damping movement that takes place by means of the pivot bearing's (11) rotation damping. 